Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a densidade em 1 de julho de 2010 quando a densidade em 1 de abril de 2010 é 1.694?
 ###Tabelas: CREATE TABLE doubles:_6_2–4 (doubles:_6_2–4_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents VARCHAR, Score VARCHAR) CREATE TABLE list_of_the_most_populous_us_counties_sorted_according_to_the_mid-2011_official_estimate_by_the_uscb (list_of_the_most_populous_us_counties_sorted_according_to_the_mid-2011_official_estimate_by_the_uscb_id AUTO_INCREMENT PRIMARY KEY, Rank VARCHAR, County VARCHAR, State VARCHAR, Land area (km²) VARCHAR, Land area (mi²) VARCHAR, April 1, 2010 census VARCHAR, April 1, 2010 density (/km²) VARCHAR, April 1, 2010 density (/mi²) VARCHAR, July 1, 2010 official estimate VARCHAR, July 1, 2010 density (/km²) VARCHAR, July 1, 2010 density (/mi²) VARCHAR, July 1, 2011 official estimate VARCHAR, July 1, 2011 density (/km²) VARCHAR, July 1, 2011 density (/mi²) VARCHAR, Mid-2010 to mid-2011 change (Absolute) VARCHAR, Mid-2010 to mid-2011 change (%) VARCHAR, County seat or courthouse VARCHAR) CREATE TABLE twenty-five_cents (twenty-five_cents_id AUTO_INCREMENT PRIMARY KEY, Year INT, Theme VARCHAR, Artist VARCHAR, Mintage VARCHAR, Issue price INT, Special notes VARCHAR) CREATE TABLE territorial_and_overseas_regions_recordholders (territorial_and_overseas_regions_recordholders_id AUTO_INCREMENT PRIMARY KEY, Country VARCHAR, Territory VARCHAR, Name VARCHAR, Birth date VARCHAR, Death date VARCHAR) CREATE TABLE mixed_team_event (mixed_team_event_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Female épée VARCHAR, Male épée VARCHAR, Female foil VARCHAR, Male foil VARCHAR, Female saber VARCHAR, Male saber VARCHAR, Average fencers rank VARCHAR, Initial Team rank INT)  
SELECT July 1, 2010 density (/km²) FROM list_of_the_most_populous_us_counties_sorted_according_to_the_mid-2011_official_estimate_by_the_uscb WHERE April 1, 2010 density (/mi²) = 1,694